[1] AppScale began as a research project at the University of California, Santa Barbara Computer Science Department under the supervision of Professor Chandra Krintz.

AppScale ATS (formerly Eucalyptus) is a managed hybrid cloud infrastructure software that emulates the core AWS APIs.

ATS enables the creation of cost-effective and flexible AWS hybrid cloud environments with a seamless experience for developers and workloads across public and private resources.

No special-purpose hardware or unorthodox operating system configurations are required and the entire software stack utilizes open-sourced components.

AppScale GTS is an open-source serverless computing platform that automatically deploys and scales unmodified Google App Engine applications over public and private clouds and on-premises clusters.